What is the pH of a solution with a high hydroxyl ion (OH-) concentration?

ADH is a peptide hormone that utilizes cAMP as the second messenger. Of the choices provided, what is the 2nd step in the process?

An automotive battery manufacturer wants to study the reserve capacity of a battery (using hours).  A researcher collected a random sample of 200 batteries and recorded the corresponding number of hours each battery lasted.  Which of the following describes the population?

A random sample of 423 students was analyzed.  The number of students achieving basic skill levels in four subjects according to the type of school is presented in the table below. What percent of sampled students achieving basic skill levels in Reading are from suburbian schools?

An automotive battery manufacturer wants to study the reserve capacity of a battery (using hours).  A researcher collected a random sample of 200 batteries and recorded the corresponding number of hours each battery lasted.  Which of the following is the observational unit?

A random sample of 423 students was analyzed.  The number of students achieving basic skill levels in four subjects according to the type of school is presented in the table below. What percent of sampled students are from urban schools?

The table shows the number of hours 12 students watched television during the weekend and the test scores of each student who took the test the following Monday. Which of the following is the proper interpretations of the coefficient of determination?

A group of boys is randomly divided into two groups. One group watches violent cartoons for one hour, and the other group watches cartoons without violence for one hour.  The boys are then observed to see how many violent actions they take in the next two hours, and the two groups are compared.  Classify this is as:

A. Which node represents the Most Recent Common Ancestor (MRCA) of Lizards and Pterosaurs?   B. Take a deep breath + a mental break. You are half way done! Type your name to receive 2  points.     

  Based on the pictures of these stomata at different tonicities, answer the following questions: A. What is the tonicity of cell C? B. Why does the cell C react this way to this tonicity?